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Winter Begins Jan 20th AWT


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man there are some horrible posts going around social media. Saw someone say this could rival the Blizzard’s of 73 and 13 here in CT...lol. 

I’m liking a swath from ME back through central/southern NH, central/southern VT back through W MA...maybe NW Hills and down through NY for the highest snows. Maybe a 10-14” range. 

Thats a lot about this that continues to be rather puzzling. I think we’re looking at a relatively short-ish window for the majority of the precipitation (maybe 8 hours?) which will hurt the snow maps showing like 20+”.

Even in a situation where this isn’t as amped as what the GFS shows there is going to be a ton of WAA and warmer air drawn into the circulation so even if it tracks say over CT I think we still bring in shallow llvl warmth. We had a situation like this last winter I think. 

Tried looking at a few euro products and something seemed really off with the snow map and those insane totals...particularly here in CT. The sfc/850 low track didn’t seem favorable for that result, however on Ryan Maue’s site there isn’t much in the way of 700mb products. 

I’m sure there will be a swath of some pretty decent freezing rain...but I also wonder if the heaviest precip is done before the thermals change to favor freezing rain. 

I think here in CT we see 4-7” of snow (all within a brief period) and then get some transition over to icing and then even sleet/rain. Not sure where the boundary sets up. 

Seeihg how quickly CAA gets involved and dry slot quickly racing NE has me wondering about longer duration precip 

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Our storm is raising blizzard warnings in the Sierras ... and wind warnings to a lot of lower elevations to the west.  Almost El Nino looking ;)  

...almost...

But, often times bigger events start leaving calling cards in the west ... the old, "this system has a history of ..."  

Just a reflection of being very dynamic /powerful mechanically... 

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18 minutes ago, weatherwiz said:

man there are some horrible posts going around social media. Saw someone say this could rival the Blizzard’s of 73 and 13 here in CT...lol. 

I’m liking a swath from ME back through central/southern NH, central/southern VT back through W MA...maybe NW Hills and down through NY for the highest snows. Maybe a 10-14” range. 

Thats a lot about this that continues to be rather puzzling. I think we’re looking at a relatively short-ish window for the majority of the precipitation (maybe 8 hours?) which will hurt the snow maps showing like 20+”.

Even in a situation where this isn’t as amped as what the GFS shows there is going to be a ton of WAA and warmer air drawn into the circulation so even if it tracks say over CT I think we still bring in shallow llvl warmth. We had a situation like this last winter I think. 

Tried looking at a few euro products and something seemed really off with the snow map and those insane totals...particularly here in CT. The sfc/850 low track didn’t seem favorable for that result, however on Ryan Maue’s site there isn’t much in the way of 700mb products. 

I’m sure there will be a swath of some pretty decent freezing rain...but I also wonder if the heaviest precip is done before the thermals change to favor freezing rain. 

I think here in CT we see 4-7” of snow (all within a brief period) and then get some transition over to icing and then even sleet/rain. Not sure where the boundary sets up. 

Seeihg how quickly CAA gets involved and dry slot quickly racing NE has me wondering about longer duration precip 

Paul , dry slot? FYI you can see 7H at weather.us This is the warmest over CT on the Euro 12Z

us_model-en-087-0_modez_2019011612_99_504_446.png

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Yeah..... I'm not going with the GFS is a terrible model meme - no way... Not when this thing isn't even sampled in the physical sounding grid.....

I mean I get where y'all's comin' from but ...  it could still be right - even if we doubt it.

You now, if a GFS low attempts ... a compromised occluded/triple point run out underneath and damaging ice after a half foot wallop would atone for that cold BL/backed by high pressure just fine...

I mean, there's little imagination being supplied to compromises so... I'd hold off the ridicule... 

 

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2 minutes ago, Ginx snewx said:

Paul , dry slot? FYI you can see 7H at weather.us This is the warmest over CT on the Euro 12Z

us_model-en-087-0_modez_2019011612_99_504_446.png

Didn’t mean dry slot in a bad way...just meant it looks like it could push in by 12z...I thought anyways. 

WTF...that is offered on weather.us for free but nothing like that for the $10 a month package

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13 minutes ago, weatherwiz said:

I’m liking a swath from ME back through central/southern NH, central/southern VT back through W MA...maybe NW Hills and down through NY for the highest snows. Maybe a 10-14” range. 

Thats a lot about this that continues to be rather puzzling. I think we’re looking at a relatively short-ish window for the majority of the precipitation (maybe 8 hours?) which will hurt the snow maps showing like 20+”.

Thats a great forecast, IMO.  Pretty much identical to the EPS highest probability snows.   And I agree on the amounts.  Maybe I'll be proven wrong but the all-snow 2"+ QPF amounts seem very hard to believe.  I feel like we've seen it in big storms where the WCB is progged to be obscene, and it is, just not at .75-1" QPF in 6 hours type deal in the snow column.  It still comes in like a wall but I could see us looking at like the HRRR hours prior and it wants to reduce QPF by like 30% of what the globals were showing for days.  

I think there was a March storm (two winters ago?) where the Euro kept printing like a wall of extremely heavy snow moving north into New England and while it was heavy, it wasn't like a foot in 6-8 hours heavy that the model was advertising.  But even in that one after looking at it in the models for days you started to think well it must be true?  A wall of 6-hrly QPF of like 0.8-1.0" stuff turned into 0.5-.7".  Still a heavy thump but toned down.

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Just now, Ginx snewx said:

Congrats VT crew on Tuesday morning having the highest 2m temp negative anomaly in the world on the 18Z GEFS of -21C

Yay... haha.  Fresh snow on top of the existing cold snowpack, along with clear skies and very cold air mass... the set-up is there for rock bottom.

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